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Ammonia is produced on large scale by Ha...

Ammonia is produced on large scale by Haber-Bosch process which involve the following reaction
`N_2(g)+3H_2 hArr 2NH_3 + "Heat"`…(i)
The condition used are 200 atmosphere pressure, `450^@ C` and a catalst "Pormoted Iron".
Originally H2 required for the reaction was produced by electrolysis of water.This was expensive a cheaper method using coke and steam was then used.Now a days, the `H_2(g)` is produced from hydrocarbons
`CH_4+2H_2O hArr CO_2 + 4H_2`...(ii)
`CH_4+H_2O hArr CO+ 3H_2`...(iii)
Some air is added the `O_2` burns with some `H_2` leaving behind `N_2(g)` to give the required ratio of `N_2:H_2=1:3`
Answer the following questions based on the above information.
Although the reaction is exothermic, it is being carried out at higher temperature beacause

A

it remove the volatile impurities.

B

activate the catalyst

C

maintain a desirable rate of reaction.

D

to have the less proportion of CO.

Text Solution

Verified by Experts

The correct Answer is:
c
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Ammonia is produced on large scale by Haber-Bosch process which involve the following reaction N_2(g)+3H_2 hArr 2NH_3 + "Heat" …(i) The condition used are 200 atmosphere pressure, 450^@ C and a catalst "Pormoted Iron". Originally H2 required for the reaction was produced by electrolysis of water.This was expensive a cheaper method using coke and steam was then used.Now a days, the H_2(g) is produced from hydrocarbons CH_4+2H_2O hArr CO_2 + 4H_2 ...(ii) CH_4+H_2O hArr CO+ 3H_2 ...(iii) Some air is added the O_2 burns with some H_2 leaving behind N_2(g) to give the required ratio of N_2:H_2=1:3 Answer the following questions based on the above information. CO produced in the reaction (iii) must be removed continuously during the reaction because.

Ammonia is produced on large scale by Haber-Bosch process which involve the following reaction N_2(g)+3H_2 hArr 2NH_3 + "Heat" …(i) The condition used are 200 atmosphere pressure, 450^@ C and a catalst "Pormoted Iron". Originally H2 required for the reaction was produced by electrolysis of water.This was expensive a cheaper method using coke and steam was then used.Now a days, the H_2(g) is produced from hydrocarbons CH_4+2H_2O hArr CO_2 + 4H_2 ...(ii) CH_4+H_2O hArr CO+ 3H_2 ...(iii) Some air is added the O_2 burns with some H_2 leaving behind N_2(g) to give the required ratio of N_2:H_2=1:3 Answer the following questions based on the above information. Besides the above process, there are several other methods of preparation of ammonia. All of the following producess ammonia except.

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